random seed

[King-king424]

https://github.com/juhongm999/hsnet/blob/6b1bc12b3ff9f3950f49c55ab6f089e8d9e0d191/train.py#L19 I found an issue where the line19 code would re-fix the random seed with the same parameters every time after the second epoch, which would make the sampled pairs and the order of the pairs the same in subsequent epochs.